Joe borrowed $4,000 from the bank at a rate of 7% simple interest per year. How much interest did he pay in 4 year? In 4 years, joe pays $blank
In interest.

Solve the system of equations. y= 2x y= x^2 - 15

Agraph of a trapezoid can have diagonals with slopes that are negative reciprocals and two pairs of adjacent sides that are congruent, true or false, and why

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?